Richard F. Pettigrew's public life spanned 50 years. He knew 10 presidents personally. https://en.wikipedia.org/wiki/Richard_F._Pettigrew
From "Triumphant Plutocracy"
AMERICAN PUBLIC LIFE
The American people should know the truth about American public life. They have been lied to so much and hoodwinked so often that it would seem only fair for them to have at least one straight-from-the-shoulder statement concerning this government "of the people, by the people and for the people," about whose inner workings the people know almost nothing.